Page-level Notifications can't fire when a tab is frozen/closed (and never on
mobile), which is why recipients on another tab/app got nothing. Adds a
notification-only service worker (sw.js, no caching) + Web Push:
- push.js: optional web-push wrapper (no-op unless web-push installed AND
VAPID_PUBLIC_KEY/VAPID_PRIVATE_KEY set -> app unaffected if unconfigured).
- push_subscriptions table + R.pushSubs repo (upsert by endpoint, prune dead).
- /api/push/vapid|subscribe|unsubscribe; DM + group message routes also send a
Web Push to recipients.
- Client registers /sw.js, subscribes when permission granted; hidden-tab popups
are left to push to avoid double-notifying (pushActive flag); SW suppresses the
OS popup when a tab is visible. Removes the old code that unregistered SWs.
Requires (prod, once): npm install + VAPID_PUBLIC_KEY/VAPID_PRIVATE_KEY/VAPID_SUBJECT env.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Sravan
sriram